Lease Commitments - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Leases [Abstract]
Operating lease right-of-use assets	$ 2,473	$ 3,098
Total operating lease liabilities	2,821	3,367
Operating lease cost	700
Rent expense	$ 800	$ 700
Rent expense			$ 200